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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN K2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 9 (ENGINE CONTROL SYSTEM - 8.1L - DTC P0030 TO DTC P0171)DTC P0068TEST DESCRIPTION
2006 Chevrolet Suburban K2500, 6.0 U

Test Description

2006 Chevrolet Suburban K2500, 6.0 USECTION Test Description
WARNING: This page is about a different variant/trim than selected.

The number below refers to the step number on the diagnostic table.

  1. 5:  Locating and repairing an individual condition may correct more than one DTC.
DTC P0068

Step Action Yes No
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Powertrain Control Module (PCM) Connector End Views or Engine Controls Connector End Views
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle
2 Is DTC P0101, P0102, P0103, P0107, P0108, P0112, P0113, P1111, or P1112 set? Go to Diagnostic Trouble Code (DTC) List - Vehicle Go to Step 3 
3
IMPORTANT: If any of the conditions listed below exist, replace the throttle body assembly. Refer to Throttle Body Assembly Replacement .
Inspect the throttle body for the following:
  • Loose or damaged throttle blade
  • Cracked or bent throttle shaft
Did you find and correct the condition?		 Go to Step 4  Go to Diagnostic Aids
4
  1. Use the scan tool in order to clear the DTCs.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC run and pass?		 Go to Step 5  Go to Step 2 
5  With a scan tool, observe the stored information, Capture Info.
Does the scan tool display any DTCs that you have not diagnosed?		 Go to Diagnostic Trouble Code (DTC) List - Vehicle System OK
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.